Garrett Metal Detectors Language:
Discover What's Hidden Below


Metal detection industry terms explained


All-Metal Mode

A metal detector setting that detects all metal objects, no discrimination

Audio Threshold

The background audio level produced when no target is being detected — it is best to adjust the audio threshold to the lowest audible level, and recommended the operator use headphones when treasure hunting.

Audio Tone

The pitch or frequency of the sound made by a detector. The tone on the GTI 2500, 1500 and GTP 1350 detectors can be adjusted on a treble to bass scale.


Larger deposits of treasure that generally consist of money and valuable objects


A filtering device, typically found at the head of a sluice, which helps prevent rocks and other large debris from falling into a gold pan.

Coin Shooting

Hunting for coins regardless of location or era of coins targeted

Composite Digger

Trowel made of durable plastic that helps prevent coin damage during recovery. Ideal for soft terrain

Control Box

Contains the detector’s main circuitry, controls, speaker, batteries and microprocessor chip

DD Searchcoil

A special configuration of the transmit and receive coils to minimize the effects of ground minerals


(Digital Signal A highly advanced computer chip used in Garrett detectors and other sophisticated Processor) electronic equipment


The ability of a metal detector to reject a target, such as a pull tab and foil or accept a target such as a coin or jewelry based on its metallic composition


See Garrett’s exclusive technology that analyzes ground mineralization and adjusts to "cancel" Ground Balance) its effects in a matter of seconds


The number of times per second the energy transmitted from a detector’s coil changes direction (e.g. 7.0 kHz = 7000 times per second) — higher frequencies are typically used to find targets such as gold nuggets, while lower frequencies are best for general purpose hunting.

Gold Pan

A bowl-shaped, shallow container that traps gold flakes

Gravity Trap™

A patented gold pan made by Garrett which has 90 degree riffles to trap small gold

Ground Balance

An adjustment made to "cancel" or ignore ground mineralization; may be done manually (See GroundTracking) or automatically

Ground Tracking

The ability of a metal detector to continuously measure the ground’s mineralization and automatically adjust the detector’s ground balance setting for optimum performance


(Graphic Target Analyzer) Exclusive Garrett technology that visually identifies a target’s conductivity or ID and also shows the discrimination pattern


(Graphic Target Imaging) Exclusive Garrett technology that measures and displays a target’s true size and depth


(Liquid Crystal Display) A graphical display that indicates target information, detector settings, etc…

Multiple Frequency

See Pulse Induction and Multiple Frequency article


Computer chip that performs digital functions that make many features such as Target ID and Discrimination possible on today’s Garrett detectors

Mono Searchcoil

Refers to searchcoils with one ring where both transmitter and receiver antennae are located

Motion Mode

Refers to the setting where coil motion is needed to detect targets



Discrimination Targets above and below these discrimination settings


A mode of operation that allows the operator to determine the precise location of a target still in the ground

Pulse Induction

Used primarily for heavily mineralized environments such as the beach or the gold fields of Australia and is found in many of today’s specialty detectors (See also Multiple Frequency)


Exclusive Garrett feature that increases the detector’s ability to detect deeper and wider — up to 20 percent


A long screwdriver-like device usually made of brass used to penetrate the ground and physically locate a detected target before digging it up


Hunting for valuable metals such as gold

Relic Hunting

Hunting for targets with historical value, such as old battlefield items or family heirlooms

Salt Elimination

A detector’s ability to eliminate the interference of salt mineralization, which adversely affects detection depth and target ID capabilities


A unique Garrett feature that automatically adjusts to the operator’s scan speed to achieve optimum performance


Also referred to as the "coil", the searchcoil is the flat, typically circular disk swept over the ground to sense the presence of metal


Generally synonymous with Depth, the adjustment that determines how deep or small a target can be detected ” the higher the sensitivity, the greater the detection depth


The adjustable stem that connects the control box and the searchcoil

Single Frequency

Offers greater potential depth capabilities, better discrimination and enhanced target ID under most common soil conditions where most treasure hunting occurs (See Multiple Frequency article for more information).

Super Sluice™

Large 15" gold pan with 1/2"deep riffles. Traps small gold nuggets up to one ounce and larger in size

Surface Elimination

A detectors ability to ignore all targets located on or near the ground’s surface, which is useful in heavy trash areas

Surface Mount PC Board Technology

The latest trend in constructing electronic circuit boards


Any metallic item sensed by a detector

Target ID Cursor


A graphical indication of the target’s probable identity (e.g. coin, gold, pull tab) based on its electrical properties

Volume Control


The ability to adjust the loudness of the audible response produced by the detection of a target